Soldato
If an expiry date for something was, for example, 13/01/2018, would you say that is inclusive or exclusive of the date given?
OP isn't talking about food expiry dates.Meat and some medicine I'd never personally go past the use by date, stuff like milk I'll go a day or two over if it seems OK, other stuff usually has a best before date anyhow.
As someone mentioned above never exceed use by on sun products - I'd even be wary close to its date as you can actually do more damage with expired sun lotion than going without it.
OP isn't talking about food expiry dates.
Only because subsequent posters didn't read the OP's latest post. In fairness though the ambiguity in the OP would lead most to believe they were taking about food.The topic has moved into a more general commentary on expiry dates though.